>> ISTM that it may be more helful to do:
>>
>> ifndef JADE
>> #error "no jade found on your system, cannot generate the documention"
>> endif
>
> We could use $(missing) for that, which is already used for bison, flex,
> and perl.
I'm fine with "$(missing)" or whatever else that provides a clear message.
Oops, not "#error", but "$(error ...)", I was mixing cpp & make above...
However the example in the doc Makefile for "collageindex.pl" is on the
heavy side, as it suggests that every use of such commands should be put
in ifdef/else/endif. ISTM that a dependence-based solution would be
simpler.
--
Fabien.